Alert archive / U.S. Virgin Islands

Weather alerts in U.S. Virgin Islands, 2019

75 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.

Alerts
75
Warnings
11
Watches
6
Advisories
30
Busiest month
August13 alerts
Busiest day
August 28, 20196 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

0 of 1 tornado reports fell inside a warning.

U.S. Virgin Islands, 2019

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings010%
Severe thunderstorm warnings00
Flash flood warnings5260%2100%13 min

Each office's whole area, 2019

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS JSJ: tornado warnings030%
NWS JSJ: severe thunderstorm warnings030%
NWS JSJ: flash flood warnings371754%8162%46 min

An office's figures cover every county it serves, including across state lines.

Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.

The alerts

Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeCountiesLasted
Jan 9, 2:51 AM CSTRip Current StatementJSJ37 hr
Jan 12, 2:16 AM CSTRip Current StatementJSJ48 hr
Jan 22, 2:45 AM CSTRip Current StatementJSJ5 days
Jan 22, 8:29 AM CSTRip Current StatementJSJ4 days
Jan 23, 2:11 AM CSTHigh Surf AdvisoryJSJ50 hr
Jan 26, 2:15 PM CSTRip Current StatementJSJ14 hr
Jan 30, 1:32 PM CSTRip Current StatementJSJ37 hr
Feb 10, 1:59 PM CSTRip Current StatementJSJ3 days
Feb 20, 3:27 PM CSTRip Current StatementJSJ4 days
Feb 24, 7:51 PM CSTRip Current StatementJSJ6 days
Apr 3, 2:58 PM CDTRip Current StatementJSJ4 days
Apr 22, 5:10 PM CDTRip Current StatementJSJ60 hr
Apr 30, 3:12 AM CDTRip Current StatementJSJ60 hr
May 1, 6:38 PM CDTAreal Flood AdvisoryJSJ2 hr
May 1, 7:55 PM CDTFlash Flood WarningJSJ3 hr
May 1, 11:03 PM CDTAreal Flood WarningJSJ5 hr
May 11, 2:41 PM CDTRip Current StatementJSJ4 days
May 23, 11:18 PM CDTAreal Flood AdvisoryJSJ3 hr
May 24, 2:14 AM CDTAreal Flood AdvisoryJSJ2 hr
May 27, 3:05 AM CDTRip Current StatementJSJ48 hr
May 27, 8:37 AM CDTAreal Flood AdvisoryJSJ113 min
May 28, 9:45 AM CDTFlash Flood WatchJSJ3 days
May 29, 6:00 AM CDTAreal Flood AdvisoryJSJ5 hr
Jun 6, 4:09 AM CDTAreal Flood AdvisoryJSJ3 hr
Jun 6, 7:16 AM CDTAreal Flood AdvisoryJSJ93 min
Jun 25, 12:32 AM CDTAreal Flood AdvisoryJSJ58 min
Jul 4, 3:36 PM CDTRip Current StatementJSJ37 hr
Jul 28, 2:53 PM CDTFlash Flood WatchJSJ3 days
Jul 31, 2:53 PM CDTAreal Flood AdvisoryJSJ3 hr
Jul 31, 4:10 PM CDTFlash Flood WarningJSJ2 hr
Aug 2, 3:25 PM CDTAreal Flood AdvisoryJSJ3 hr
Aug 27, 4:31 AM CDTHurricane WatchJSJ39 hr
Aug 27, 4:31 AM CDTTropical Storm WarningJSJ39 hr
Aug 27, 12:52 PM CDTFlash Flood WatchJSJ52 hr
Aug 27, 4:49 PM CDTRip Current StatementJSJ4 hr
Aug 27, 8:54 PM CDTCoastal Flood WarningJSJ22 hr
Aug 27, 8:54 PM CDTHigh Surf WarningJSJ22 hr
Aug 28, 7:05 AM CDTFlash Flood WarningJSJ4 hr
Aug 28, 9:30 AM CDTFlash Flood WarningJSJ9 hr
Aug 28, 10:11 AM CDTHurricane WarningJSJ15 hr
Aug 28, 3:18 PM CDTFlash Flood WarningJSJ3 hr
Aug 29, 5:35 PM CDTAreal Flood AdvisoryJSJ3 hr
Aug 29, 6:24 PM CDTAreal Flood AdvisoryJSJ117 min
Sep 16, 3:25 AM CDTRip Current StatementJSJ7 days
Sep 18, 7:48 PM CDTHigh Surf AdvisoryJSJ3 days
Sep 22, 9:45 AM CDTTropical Storm WatchJSJ18 hr
Sep 23, 2:34 AM CDTFlash Flood WatchJSJ62 hr
Sep 23, 4:12 AM CDTTropical Storm WarningJSJ48 hr
Sep 30, 2:57 AM CDTRip Current StatementJSJ4 days
Oct 5, 9:48 AM CDTAreal Flood AdvisoryJSJ87 min
Oct 7, 2:42 AM CDTRip Current StatementJSJ4 days
Oct 7, 2:42 AM CDTRip Current StatementJSJ8 days
Oct 11, 11:26 AM CDTAreal Flood AdvisoryJSJ78 min
Oct 15, 11:07 AM CDTAreal Flood AdvisoryJSJ113 min
Oct 17, 12:00 PM CDTAreal Flood AdvisoryJSJ2 hr
Oct 18, 10:17 AM CDTAreal Flood AdvisoryJSJ118 min
Oct 18, 12:18 PM CDTAreal Flood AdvisoryJSJ57 min
Oct 18, 1:21 PM CDTAreal Flood AdvisoryJSJ90 min
Oct 26, 3:26 PM CDTRip Current StatementJSJ11 days
Oct 27, 8:19 AM CDTHigh Surf AdvisoryJSJ7 days
Oct 31, 3:05 AM CDTCoastal Flood AdvisoryJSJ62 hr
Nov 1, 3:19 AM CDTCoastal Flood AdvisoryJSJ50 hr
Nov 2, 11:41 AM CDTAreal Flood AdvisoryJSJ2 hr
Nov 3, 9:45 AM CSTAreal Flood AdvisoryJSJ3 hr
Nov 3, 10:57 AM CSTAreal Flood AdvisoryJSJ3 hr
Nov 10, 1:39 AM CSTRip Current StatementJSJ3 days
Nov 14, 2:10 AM CSTRip Current StatementJSJ62 hr
Nov 20, 2:08 PM CSTRip Current StatementJSJ5 days
Nov 29, 2:36 PM CSTRip Current StatementJSJ5 days
Nov 29, 7:01 PM CSTHigh Surf AdvisoryJSJ69 hr
Nov 30, 6:30 PM CSTCoastal Flood AdvisoryJSJ39 hr
Dec 10, 3:01 AM CSTRip Current StatementJSJ9 days
Dec 20, 8:19 AM CSTRip Current StatementJSJ12 days
Dec 26, 11:56 AM CSTAreal Flood AdvisoryJSJ3 hr
Dec 26, 3:47 PM CSTRip Current StatementJSJ6 days

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force nowTornadoes on recordThe radar archive20182020

Sources

National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.